Strangeness production in the reaction pp→K+Λp in the threshold region

被引：103

作者：

Bilger, R ^{[1
]}

Bohm, A

Brand, H

Brand, S

Brinkmann, KT

Clement, H

Dellert, M

Dennert, H

Eyrich, W

Filges, D

Freiesleben, H

Fritsch, M

Geyer, R

Hassan, A

Hauffe, J

Herrmann, P

Hubner, B

Jahn, P

Kilian, K

Kirsch, M

Koch, H

Kress, J

Krug, J

Kuhlmann, E

Lange, JS

Metzger, A

Michel, P

Moller, K

Moosburger, M

Morsch, HP

Nake, C

Nann, H

Naumann, B

Naumann, L

Ringe, P

Roderburg, E

Rogge, M

Schamlott, A

Schonmeier, P

Schulke, A

Sperl, R

Steinke, M

Stinzing, F

Turek, P

Wagner, GJ

Wirth, S

Zielinski, U

机构：

[1] Univ Tubingen, D-72074 Tubingen, Germany

[2] Ruhr Univ Bochum, D-4630 Bochum, Germany

[3] Tech Univ Dresden, Dresden, Germany

[4] Univ Erlangen Nurnberg, D-8520 Erlangen, Germany

[5] Forschungszentrum Julich, Julich, Germany

[6] Forschungszentrum Rossendorf EV, Dresden, Germany

[7] IUCF Bloomington, Bloomington, IN USA

[8] Atom Energy Author, NRC, Cairo, Egypt

来源：

PHYSICS LETTERS B | 1998年 / 420卷 / 1-2期

关键词：

associated strangeness production; total cross section; angular and momentum distributions; polarization;

D O I：

10.1016/S0370-2693(97)01573-6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The reaction pp --> K+ Lambda p was measured exclusively at the cooler synchrotron COSY at beam momenta of p(Beam) = 2.50 GeV/c and p(Beam) = 2.75 GeV/c using the TOF detector. Angular and momentum distributions were obtained for the full phase space of the reaction products. Total cross sections were extracted to be (2.7 +/- 0.3) mu b and (12.0 +/- 0.4) mu b, respectively. The polarization of the Lambda-hyperon was determined as a function of its transversal momentum and was found to be negative for transverse momentum transfers of p(T) greater than or equal to 0.3 GeV/c. The results together with existing data are compared with phenomenological parametrizations and model calculations on the basis of meson exchange. (C) 1998 Elsevier Science B.V.

引用

页码：217 / 224

页数：8

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